Urology — MCQs

Urology Indian Medical PG Practice Questions and MCQs

Question 121: A 5-year-old child presents with erythema and edema over the prepuce after pulling at the penile skin while urinating. What is the most likely diagnosis?

A. Hypospadias
B. Urethral stone
C. Posterior urethral valve
D. Phimosis (Correct Answer)

Explanation: **Explanation:** The clinical presentation of erythema and edema over the prepuce in a child who has been manipulating the penile skin is characteristic of **Phimosis**. **Why Phimosis is the Correct Answer:** Phimosis is the inability to retract the distal prepuce over the glans penis. In children, this can lead to "ballooning" of the prepuce during micturition as urine gets trapped between the glans and the tight foreskin. The resulting stasis of urine often leads to irritation, inflammation, and infection of the glans and prepuce (**Balanoposthitis**), which manifests as the erythema and edema described in the question. The child’s act of "pulling at the skin" is a common behavioral response to the discomfort or the difficulty in passing urine through the narrowed preputial opening. **Analysis of Incorrect Options:** * **Hypospadias:** This is a congenital anomaly where the urethral meatus is on the ventral aspect of the penis. While it may be associated with a hooded prepuce, it does not typically present with acute edema and erythema unless complicated by infection. * **Urethral Stone:** While it can cause sudden urinary retention and pain, it would not primarily cause edema and erythema of the *prepuce* itself; the pathology would be localized to the urethra. * **Posterior Urethral Valve (PUV):** This is a cause of bladder outlet obstruction in male infants. It presents with a poor urinary stream and a palpable bladder, but the external genitalia (prepuce) appear normal. **Clinical Pearls for NEET-PG:** * **Physiological vs. Pathological:** Most phimosis in infants is physiological (due to natural adhesions) and resolves by age 3–5. Pathological phimosis is often due to **Balanitis Xerotica Obliterans (BXO)**. * **Paraphimosis:** A surgical emergency where the retracted tight prepuce cannot be returned to its original position, leading to venous congestion and potential necrosis of the glans. * **Management:** Initial treatment for symptomatic phimosis includes topical steroids (Betamethasone); if refractory or causing recurrent UTIs, **circumcision** is the definitive treatment.

Question 122: What is the most common long-term complication causing mortality after urinary diversion?

A. Renal failure due to pyelonephritis (Correct Answer)
B. Persistent electrolyte imbalance
C. Colonic carcinoma
D. Bilateral renal calculi

Explanation: ### Explanation The correct answer is **Renal failure due to pyelonephritis**. **1. Why it is correct:** Urinary diversion (such as an ileal conduit or orthotopic neobladder) involves the transposition of the ureters into a segment of the bowel. This procedure inherently destroys the natural anti-reflux mechanism of the vesicoureteral junction. Consequently, patients suffer from **chronic vesicoureteral reflux** and **ascending bacterial colonization** from the intestinal segment. Over time, recurrent subclinical or clinical bouts of **chronic pyelonephritis** lead to progressive renal scarring, nephron loss, and eventually **chronic renal failure**, which remains the leading cause of long-term mortality in these patients. **2. Why the other options are incorrect:** * **B. Persistent electrolyte imbalance:** While metabolic acidosis (hyperchloremic) is common due to the reabsorption of ammonium and chloride by the bowel mucosa, it is usually manageable with medical therapy and rarely leads to mortality. * **C. Colonic carcinoma:** There is a documented increased risk of adenocarcinoma (especially in ureterosigmoidostomy) due to the mixing of urine and feces. However, this is a late complication (10–20 years) and is less frequent than renal failure. * **D. Bilateral renal calculi:** While stasis and infection increase the risk of urolithiasis, stones are a morbidity factor rather than the primary cause of death. **3. Clinical Pearls for NEET-PG:** * **Most common metabolic abnormality:** Hyperchloremic metabolic acidosis (especially with ileal or colonic segments). * **Ureterosigmoidostomy:** Highest risk of carcinogenesis (adenocarcinoma at the site of implantation). * **Vitamin Deficiency:** Long-term use of ileal segments can lead to **Vitamin B12 deficiency** due to resection of the terminal ileum. * **Gold Standard Diversion:** The **Ileal Conduit (Bricker’s procedure)** is the most common non-continent diversion, but it still carries the risk of upper tract deterioration over decades.

Question 123: A 'bag of worms' appearance in the scrotum is typically associated with which condition?

A. Varicocele (Correct Answer)
B. Spermatocele
C. Inguinal hernia
D. Hydrocele

Explanation: **Explanation:** The "bag of worms" appearance is the classic clinical description for a **Varicocele**. This condition involves the abnormal dilation and tortuosity of the pampiniform plexus of veins within the spermatic cord. It occurs due to incompetent valves or venous obstruction, leading to blood pooling. It is most common on the **left side** (approx. 90%) because the left testicular vein enters the left renal vein at a perpendicular (90°) angle, leading to higher hydrostatic pressure compared to the right side, which drains obliquely into the IVC. **Why the other options are incorrect:** * **Spermatocele:** This is a retention cyst of the epididymis containing spermatozoa. It presents as a smooth, painless, transilluminating mass located superior to the testis. * **Inguinal Hernia:** This presents as a swelling in the groin or scrotum that typically has an expansile cough impulse and may be reducible. It does not have a "worm-like" texture. * **Hydrocele:** This is a collection of fluid within the tunica vaginalis. It presents as a smooth, tense, fluctuant swelling that is brilliantly transilluminating. **High-Yield Clinical Pearls for NEET-PG:** * **Diagnosis:** Varicoceles are best palpated while the patient is standing or performing the **Valsalva maneuver**. * **Infertility:** Varicocele is the most common surgically reversible cause of male infertility (due to increased scrotal temperature). * **Secondary Varicocele:** A sudden onset or right-sided varicocele should prompt an investigation for a **Renal Cell Carcinoma (RCC)** obstructing the renal vein. * **Grading:** Grade I (palpable only with Valsalva), Grade II (palpable standing), Grade III (visible through scrotal skin).

Question 124: What is the most common immediate complication of vasectomy?

A. Nerve injury
B. Hematoma (Correct Answer)
C. Syncope
D. None of the above

Explanation: **Explanation:** Vasectomy is a common minor surgical procedure involving the disruption of the vas deferens to achieve permanent male sterilization. Understanding its complications is high-yield for surgical exams. **Why Hematoma is the correct answer:** **Hematoma** is recognized as the most common immediate/early complication following a vasectomy, occurring in approximately 1–2% of cases. It typically results from the injury of small pampiniform plexus veins or the deferential artery during the dissection or exteriorization of the vas. Because the scrotal tissue is loose and highly distensible, even minor bleeding can lead to a significant collection of blood, often presenting as painful swelling shortly after the procedure. **Analysis of Incorrect Options:** * **A. Nerve Injury:** While chronic post-vasectomy pain syndrome (PVPS) can involve nerve irritation (e.g., ilioinguinal or genitofemoral branches), acute nerve injury is rare and not the most frequent immediate concern. * **C. Syncope:** Vasovagal syncope can occur during the procedure due to anxiety or traction on the spermatic cord, but it is considered a transient physiological reaction rather than a surgical complication of the site itself. **High-Yield Clinical Pearls for NEET-PG:** * **Most common overall complication:** Hematoma and infection (incidence varies, but hematoma is the classic "immediate" answer). * **Late complication:** Sperm granuloma (due to sperm leakage) and Post-Vasectomy Pain Syndrome (PVPS). * **Failure Rate:** Approximately 0.1%. Patients must be informed that they are **not** immediately sterile. * **Post-op Protocol:** Contraception must be continued until **two consecutive semen analyses** show azoospermia (usually after 12 weeks or 20 ejaculations).

Question 125: Subcapsular nephrectomy is indicated in which of the following conditions?

A. Perinephric abscess
B. Hydronephrosis
C. Pyonephrosis (Correct Answer)
D. Polycystic kidney disease

Explanation: **Explanation:** **Subcapsular nephrectomy** (also known as Federoff’s operation) is a surgical technique where the kidney is removed by stripping it from its capsule, rather than removing the capsule along with the kidney. **Why Pyonephrosis is the Correct Answer:** In chronic inflammatory conditions like **pyonephrosis** or xanthogranulomatous pyelonephritis, severe inflammation leads to dense, woody adhesions between the renal capsule and the surrounding Gerota’s fascia/perinephric fat. Attempting a standard nephrectomy in these cases carries a high risk of injuring adjacent structures (e.g., duodenum, colon, or great vessels). By incising the capsule and mobilizing the kidney within the subcapsular plane, the surgeon can safely reach the renal hilum while avoiding these dangerous adhesions. **Analysis of Incorrect Options:** * **Perinephric abscess:** The primary treatment is percutaneous drainage and antibiotics. If nephrectomy is needed later, it is due to the underlying cause (like pyonephrosis), but the abscess itself is an extracapsular collection. * **Hydronephrosis:** Unless complicated by severe infection or chronic inflammation, the planes between the capsule and fascia remain identifiable, allowing for a standard simple nephrectomy. * **Polycystic kidney disease (PKD):** While the kidneys are massive, they are typically removed via standard nephrectomy (often to make space for a transplant). Subcapsular dissection is not the standard approach unless there is secondary chronic infection. **High-Yield NEET-PG Pearls:** * **Indication:** Reserved for the "difficult kidney" where the perinephric space is obliterated by dense fibrosis. * **Key Step:** The renal capsule is incised on the convex border, and the parenchyma is separated from the capsule down to the hilum. * **Complication Note:** The main challenge in subcapsular nephrectomy is managing the renal pedicle, as the capsule must be reflected back at the hilum to ligate the vessels securely.

Question 126: Which of the following is the most preferred approach for pituitary surgery at the present time?

A. Transcranial
B. Transcallosal
C. Transethmoidal
D. Transsphenoidal (Correct Answer)

Explanation: **Explanation:** The **Transsphenoidal approach** is currently the gold standard and most preferred surgical route for the majority of pituitary tumors (e.g., adenomas, craniopharyngiomas). **Why Transsphenoidal is preferred:** This approach utilizes the natural corridor of the nasal cavity and sphenoid sinus to reach the sella turcica. Its primary advantages include: * **Minimal Invasiveness:** Avoids brain retraction and large craniotomies. * **Lower Morbidity:** Reduced risk of neurovascular injury and shorter recovery times. * **Endoscopic Advancement:** Modern pituitary surgery is predominantly **Endoscopic Endonasal Transsphenoidal Surgery**, providing superior visualization compared to the older microscopic method. **Analysis of Incorrect Options:** * **A. Transcranial:** Historically used for large tumors with massive lateral extension. It involves a craniotomy (e.g., subfrontal approach) and carries higher risks of brain edema and anosmia. It is now reserved for rare, complex cases. * **B. Transcallosal:** This route involves going through the corpus callosum. It is primarily used for lesions within the **third ventricle** or lateral ventricles, not for the sella turcica. * **C. Transethmoidal:** While this route reaches the midline, it provides a narrower field of view and is technically more cumbersome than the direct transsphenoidal route. **High-Yield Clinical Pearls for NEET-PG:** * **First-line treatment:** Surgery is the first-line treatment for all symptomatic pituitary adenomas **EXCEPT Prolactinomas** (which are treated medically with Dopamine agonists like Cabergoline). * **Complication:** The most common transient complication post-transsphenoidal surgery is **Diabetes Insipidus** (due to posterior pituitary manipulation). * **Contraindication:** A poorly pneumatized (conchal type) sphenoid sinus is a relative contraindication for the transsphenoidal approach.

Question 127: What is the treatment for a pelvic abscess that extends into the pouch of Douglas?

A. Hysterotomy
B. Posterior colpotomy (Correct Answer)
C. Transabdominal drainage
D. Colpography

Explanation: **Explanation:** The **Pouch of Douglas (Rectouterine pouch)** is the most dependent part of the peritoneal cavity in the upright position. When a pelvic abscess develops, pus naturally gravitates here. **Why Posterior Colpotomy is Correct:** A **posterior colpotomy** involves making an incision through the posterior vaginal fornix into the Pouch of Douglas. This is the preferred treatment because: 1. **Proximity:** The abscess wall is directly adjacent to the thin vaginal vault, allowing for easy access. 2. **Gravity-dependent drainage:** It provides the most efficient drainage route. 3. **Avoidance of Laparotomy:** It is a minimally invasive approach compared to transabdominal surgery, reducing the risk of bowel injury and peritoneal contamination. **Analysis of Incorrect Options:** * **Hysterotomy (A):** This is a surgical incision into the uterus (e.g., for a C-section). It does not provide access to the extra-uterine pelvic space and would be inappropriate for abscess drainage. * **Transabdominal drainage (C):** While possible under ultrasound/CT guidance, it is generally avoided if the abscess is low in the pelvis because it requires traversing the entire peritoneal cavity, increasing the risk of generalized peritonitis. * **Colpography (D):** This is a diagnostic imaging technique (X-ray of the vagina) and not a therapeutic procedure. **High-Yield Clinical Pearls for NEET-PG:** * **Clinical Presentation:** A pelvic abscess often presents with "swinging pyrexia," pelvic pain, and tenesmus (feeling of incomplete defecation) due to rectal irritation. * **Diagnosis:** On Per-Rectal (PR) or Per-Vaginal (PV) examination, a **boggy, tender mass** is felt in the posterior fornix. * **Alternative in Males:** In males, the equivalent procedure is **transrectal drainage** through the anterior rectal wall. * **Prerequisite:** Drainage should only be performed when the abscess is "pointing" (fluctuant) against the vaginal or rectal wall.

Question 128: Which of the following symptoms does not typically improve following a Transurethral Resection of the Prostate (TURP)?

A. Nocturia
B. Post-micturition dribble (Correct Answer)
C. Incomplete emptying
D. Urge incontinence

Explanation: **Explanation:** Transurethral Resection of the Prostate (TURP) is the gold standard surgical treatment for Lower Urinary Tract Symptoms (LUTS) secondary to Benign Prostatic Hyperplasia (BPH). LUTS are categorized into **Storage** and **Voiding** symptoms. **Why Post-micturition dribble is the correct answer:** Post-micturition dribble is the involuntary loss of urine immediately after finishing urination. It is often caused by urine being trapped in the bulbar urethra (due to the "sump effect") rather than by prostatic obstruction itself. Since TURP addresses the **bladder outlet obstruction (BOO)** at the level of the prostatic urethra but does not alter the anatomy or tone of the bulbar urethra or the pelvic floor muscles, this specific symptom typically persists post-operatively. **Analysis of Incorrect Options:** * **Incomplete emptying (Voiding symptom):** This is a direct result of mechanical obstruction. By resecting the adenoma, TURP widens the urethral channel, significantly improving flow and reducing post-void residual volume. * **Nocturia & Urge incontinence (Storage symptoms):** These occur due to detrusor overactivity caused by the bladder working against high pressure. Once the obstruction is removed, the bladder wall hypertrophy regresses, and irritability decreases, leading to improvement in these symptoms (though they may take longer to resolve than voiding symptoms). **High-Yield Clinical Pearls for NEET-PG:** * **Most improved symptom post-TURP:** Poor urinary stream (Flow rate). * **Least improved symptom post-TURP:** Nocturia (often multifactorial, involving age and renal physiology). * **Commonest complication of TURP:** Retrograde ejaculation (~75% of cases). * **TURP Syndrome:** Caused by systemic absorption of glycine (hypotonic, non-electrolytic irrigation fluid), leading to dilutional hyponatremia and neurological symptoms.

Question 129: What is the most common testicular tumor of childhood?

A. Teratoma
B. Seminoma
C. Choriocarcinoma
D. Embryonal carcinoma (Correct Answer)

Explanation: **Explanation:** The correct answer is **Embryonal carcinoma** (specifically the **Yolk Sac Tumor** variant). In pediatric urology, Yolk Sac Tumor—historically referred to as infantile embryonal carcinoma or orchidoblastoma—is the most common primary testicular neoplasm in children, accounting for approximately 80% of cases in this age group. **Breakdown of Options:** * **Embryonal Carcinoma (Yolk Sac Tumor):** In children, these tumors typically present before age 3. They are characterized by the presence of **Schiller-Duval bodies** on histology and a significant elevation of serum **Alpha-fetoprotein (AFP)**. * **Teratoma:** While the second most common germ cell tumor in children, it is less frequent than Yolk Sac Tumors. Unlike adult teratomas, pediatric teratomas usually follow a benign clinical course. * **Seminoma:** This is the most common testicular tumor in **adults** (ages 30–40). It is extremely rare in prepubertal children. * **Choriocarcinoma:** This is a highly aggressive tumor characterized by high levels of **hCG**. It is rare in children and usually presents as part of a mixed germ cell tumor in post-pubertal males. **High-Yield Clinical Pearls for NEET-PG:** * **Most common overall testicular tumor in children:** Yolk Sac Tumor (Infantile Embryonal Carcinoma). * **Most common benign testicular tumor in children:** Teratoma (often treated with testis-sparing surgery). * **Tumor Marker:** AFP is the definitive marker for Yolk Sac Tumors; it is never elevated in pure seminomas. * **Age Distribution:** Testicular tumors in children show a bimodal distribution, with the first peak occurring before age 3 (mostly Yolk Sac Tumors).

Question 130: A 9-year-old boy presented with abdominal pain and recurrent UTI. IVP revealed duplication of the left ureter. What is the most likely site of ectopic opening?

A. Prostatic urethra (Correct Answer)
B. Ejaculatory duct
C. Seminal vesicle
D. Vas deferens

Explanation: In cases of **ureteral duplication**, the **Weigert-Meyer Law** states that the ureter draining the upper pole moiety is the one that opens ectopically (inferior and medial to the normal orifice). ### Why Prostatic Urethra is Correct In males, ectopic ureters always drain **above the external sphincter**. The most common site for an ectopic ureteric opening in males is the **prostatic urethra** (approx. 50% of cases), followed by the seminal vesicles and vas deferens. Because the opening is proximal to the external sphincter, males with ectopic ureters typically present with **UTIs or flank pain** rather than urinary incontinence. ### Explanation of Incorrect Options * **B, C, and D (Ejaculatory duct, Seminal vesicle, Vas deferens):** While these are possible sites for ectopic drainage in males (as they all derive from the Wolffian/Mesonephric duct), they are statistically less common than the prostatic urethra. Drainage into these structures often leads to symptoms like epididymitis or perineal pain rather than simple recurrent UTI. ### High-Yield Clinical Pearls for NEET-PG * **Gender Difference in Incontinence:** In **females**, ectopic ureters can open below the sphincter (e.g., vestibule, vagina), leading to the classic presentation of **"constant dribbling despite normal voiding patterns."** In **males**, they always open above the sphincter, so they **never** present with incontinence. * **Weigert-Meyer Law:** 1. **Upper pole ureter:** Ectopic opening; prone to **obstruction/ureterocele**. 2. **Lower pole ureter:** Normal opening (but more lateral); prone to **vesicoureteral reflux (VUR)**. * **Embryology:** The ectopic ureter results from the ureteric bud arising too high on the Mesonephric duct, causing it to be incorporated later and lower into the urogenital sinus.

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Urinary Calculi

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Renal Cell Carcinoma

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Testicular Tumors

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Urology — MCQs

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